Fully Integrated Mm-Scale 5G RF MIMO Harvester with −40dBm Sensitivity and Spatial MPPT via Hybrid Transformer-Based Combining/Shifting
Abstract
A MIMO RF harvester in the 5G 28-GHz band with spatial MPPT is introduced to self-align high-gain harvesting direction with maximum power availability. Spatial scanning is enabled by a hybrid 2-level RF/DC antenna power combining and phase shifting based on transformers, while eliminating conventional off-chip capacitor(s). A 22nm test-chip shows −40dBm harvesting sensitivity, and power conversion efficiency of 56.7% at$0 \text{dBm}(1.3 \times$better than prior art at 28GHz).
Fields of Study & Subjects
Energy Harvesting in Wireless Networks
Radio Frequency Integrated Circuit Design
Advanced Power Amplifier Design
Publication details
- Journal / source
- Digest of technical papers/Digest of technical papers - IEEE International Solid-State Circuits Conference
- Pages
- 294–296
- Publication date
- 15 February 2026
- Language
- EN